* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #000000;
  color: #ffffff;
  transition: background-color 0.5s ease;
}
.container {
  text-align: center;
}
button {
  padding: 15px 25px;
  font-size: 1em;
  background-color: #ffffff;
  color: #000000;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  box-shadow: 15px 15px 25px rgba(0, 0, 0, 0.2);
}
